N14 injectors, ECM, harness issues ...

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mp4694330, Aug 17, 2019.

  1. mp4694330

    mp4694330 Road Train Member

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    Howdy! So I am pulling my hairs out. 2nd set of injectors (all of them Cummins Reman) and again have at least one gone bad (smoking and my local guy did quick test)...Year and half after whole engine was rebuild...Is it possible that ECM and/or harness causing them go, without throwing any code ??? Is it possible to test ECM, if yes where to send it ? Or leave ECM alone and replace harness first, I am suspecting that they are original ( this is 99 year truck)...Found aftermarket rebuilder of injectors, Premco, my buddy used them for 100k miles now and they are going strong...link below...Appreciate all input and advice !!!

    PS...my local guy is not the one who did total engine rebuild, he was swamped with work at that time.

    dieselparts.com - Cummins HD,Inject-Componet-ReMan,Amer-Made-ReMan
     
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  3. 062

    062 Road Train Member

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    @blairandgretchen had a 60 series ecm rebuilt or freshened up. Maybe his guy does Cummins also.
     
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  4. mp4694330

    mp4694330 Road Train Member

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    Nope, he don't deal with Cummins ECMs...
     
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  5. mp4694330

    mp4694330 Road Train Member

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  6. Heavyd

    Heavyd Road Train Member

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    If you have the same hole going bad, you might suspect something electrical. Word on the street is, Cummins no longer manufactures parts to properly rebuild N14 injectors anymore. N14 is now obsolete to them and not something they want to support anymore. So current genuine reman Cummins injectors are commonly getting rebuild from previous cores returns that were already rebuild before and therefore the quality is really starting to suffer and fewer of them actually have newer parts inside anymore.
     
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  7. mp4694330

    mp4694330 Road Train Member

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    TY for an answer, did You ever heard that N14 ECM can make injectors go bad (shorting them)
    ???
     
    Last edited: Aug 18, 2019
  8. Heavyd

    Heavyd Road Train Member

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  9. xsetra

    xsetra Road Train Member

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    I bought my N14 injectors from Interstate McBee. They are working fine.

    Did you check or replace the harness pass thrus, they deteriorate over time. I
    was also told replacing just the wire connection on the injectors can solve issues.
     
    Last edited: Aug 19, 2019
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  10. mrbamcclain

    mrbamcclain Light Load Member

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    Yes, a bad ECM can also cause a short in an injector. Typically the driver for that particular injector in the ECM went bad and took the injector with it.
     
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